Art of obtaining products from sludge



1,642,060 L. BURGESS Y ART OF OBTAINING PRODUCTS. FRdM SLUDGE Filed Dec.22, 1922" ,EZK:

Lou'ps Burgess SCAM-WW (Tram, j

86 The sludge to be treated, for exam I Patented Sept. 13,1927. I

uN -rno sr rs's PATENT OFFICE.

LOUIS Bananas, or BAYONNE, new .rnnsnx, ASSIGNOR 'ro srmnann DEVELOPMENT,(IOMPANY, OF NEW YORK, N. Y.,

A CORPORATION OF DELAWARE.

- an: or OBTAINING rn'onuc'rs snort snu'nen.

Application filed December 22, 1922. Serial No. 608,441.

This invention relates to the art of working up sludge which resultsfrom the treatingof hydrocarbon oils with, s rong sulfuric acid. Theinvention will be fully understood from the following description, takenin connection with the accom anying drawing which representssemiiagrammaticallya form of apparatus co'ntemplated.

In the drawing, the reference character 1 designates a rece tacleprovided with stirring means, as bla es on shafts 2, the shafts beingdriven by gearing'or other desired drive. A pipe 3 supplies sludge andan outlet 4 connects with a separating tank 5 which has one overflow 6which extends up from the lower part of the tank and another overflow 7from the top. Further agitators or stirring receptacles 1, 1",as many as2.0 desired, and similar to receptacle 1 are pro- -vided on in series,and alternating with them separatin tanks 5, 5 the overflow *7 from tank5 eading to receptacle 1, and the outlet 4! from thereceptacle 1connecting with tank 5, and so on. The ove'rflow 11' from the lowerportion of tank 5" leads to a steam lift 12, and a pipe 13 whichextendsback to receptacle 1, and the overflow 11" from the lower portion'of tank 5" '30 leads to a steam lift 12" and a pipe 13' v which extendsback to receptacle 1'. The overflow 7" from \the last tank 5 of theseries leads to-a neutralizer mixer 14 having suitable stirring-arms 15on a driven shaft.

sludge resu ting from the action of sulfuric acid on lubricating stocks,is is by pipe 3'into the stirring receptacle l'while a stream of sodiumchlorides. solution 40 provided in about equal proportion. Th

sludge is stirred vup with the salt solution and the mixture feedsthrough connection 4'to the tank 5 where a separation occurs, the sludgerising and floating as a top layer.

The salt solution overflows from be ow through pi e 6 to the sewer, andthe slud e overflows t rough connection 7 on to t e next receptacle 1where it is again stirred up with salt. solution and is then passed totank 5 to separate. The salt solution again overflows from below throughpipe 11 and isforwarded by the steam lift 12 to the lo the receptacle 1.The sludge flows over by connection 7 to the next receptacle 1" where itis again stirred up with salt solution and is then in turn passed to thenext tank 5" to separate. The salt solution overflowingby pipe 11 isforwarded by steam lift 12 to receptacle 1 and the sludge overflows at.connection 7". As many successive mixings with salt-solution followed byseparation are carried out as the sludge handled may require. Ordinarilythree such treatments are desirable.

In starting up the system, the flow of salt solution is turned in first,so asto be passed back through the system to receptacle 1 by the timethe flow ofsludge is turned on. Thesalt solution enters the system atthe last stirrer by pipe 17 from the supply tank 16 and is supplied hot,the bottom of the tank containing a steam coil 18. A grid 19 in the tankserves to support a supply of rock salt to maintain the concentrationdesired. The steam lifts 12 and 12 operate also to hold up thetemperature of the brine, and heatjnsnlation 20 is applied throughoutthe systems A. temperature .above 1209 F. is maintained; in the tanks 5etc. particularlya temperature of 125 F., or preferabl 150 F.,up toboiling being important, an it is desirable that the salt solutioncoming from the brine supply tank be saturated. The treatment with thesalt solution removes surfuric' acid and other undesirable materialsfrom the sludge, so that by the time it leaves. the last separator tankat 7 it is a mass of almost pure organic compounds. In the mixer '14 themass is neutralized, for example with powderedslalcked lime or powdered.sodium arbonate, andis then drawn off for storage or use. If desired,the product may be-dried down further, for convenient handling. While Ihave described myinvention b reference to certain specific details, it w1 be understood that these are illustrative rather than limitative, andthe invention is -to be regarded as limited only as defined in thefollowin claim, in which it is my intention to claim all inherentnovelty as broadly as the prior art permits.

What I claim-1s Apparatus for treatingacid sludge and the like,comprising two agitators, means for supplying sludge to the firstagitator, a separator receiving efliuent from the first agitator anddischarging into the second --agitator, a second so arator receivingeliiuent from the secon agitator, means for supplying a treatingsolution to the second agitator, treating so to the first agitator forpreliminary and a, steam lift for conveying lution from the secondseparator treat- 10 solution.

LOUIS BURGESS.

